Hi All,
I have a PPP server with Public IP and enabled an L2TP server inside it then I created a secret ( username:- user & password:- 123 ). From the client side, I have Mikroitk with LTE.
- First I connected the LTE client device to the 4G network
- Create an L2TP client in the client device and used the Public server IP as remote which is reachable from a 4G network (i.e. via the internet ).

The user is connected fine … My question here is how I can config the server side to restrict the username (user) on its first device only and not allow him to connect from another device. I mean I want to lock this account only on the first client device and it will not work from any other device even if the first dives were not connected. Thanks in advance.

In PPPOE the case is easy, I can lock the account on the MAC address ,,, In PPP secret i cant found this option ...

Kind Regards

Dear All,
No one can help me in this case, or no one have solution and workaround ..

Kind Regards